Effects of microstructure coarsening and casting pores on the tensile and fatigue properties of cast A356-T6 aluminum alloy: A comparative investigation

doi:10.1016/j.msea.2022.144106

IMR OpenIR

	Effects of microstructure coarsening and casting pores on the tensile and fatigue properties of cast A356-T6 aluminum alloy: A comparative investigation
	Yang, Bao-Cheng 1,2; Chen, Shuai-Feng 1; Song, Hong-Wu 1; Zhang, Shi-Hong 1; Chang, Hai-Ping 3; Xu, Shi-Wen 3; Zhu, Zhi-Hua 3; Li, Chang-Hai 3
通讯作者	Song, Hong-Wu(hwsong@imr.ac.cn)
	2022-11-01
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	857 页码:16
摘要	A356 alloys processed mostly with the low pressure die casting method are always known to contain casting pores and inhomogeneous microstructure. In this study, the effects of microstructure coarsening and casting pores on the tensile and high-cycle fatigue properties of A356-T6 alloy are comprehensively investigated. The deformation behavior and fracture mechanisms are systematically analyzed by combining tensile tests and crystal plasticity finite element method (CP-FEM) simulations with distinctively initial microstructure features (fine microstructure, coarse microstructure, and coarse microstructure with pores). The results show that microstructure coarsening is presented in the notably grown alpha-Al dendrites, which leads to the connection and thickening of eutectic regions accompanied by the aggregative distribution of eutectic Si particles. With the coarsening microstructure, microcrack is easier to initiate in those thick eutectic regions, due to the higher stress concentration caused by the aggregated eutectic silicon. Particularly, the dominant crack propagation path changes from the trans-dendrite for fine microstructure to along eutectic regions with coarse microstructure. In addition, it confirms that the casting pores have larger detrimental effects on the tensile and fatigue properties than the microstructure coarsening in the aspects of crack initiation. Stress concentration is prone to be induced at the local edge of pore at the initial loading stage, resulting in the micro plastic deformation and lower fatigue properties. With the rapid strain accumulation in later stage, the microcracks can initiate prematurely at the local edge of pore, and thus lead to obvious decrease in tensile elongation. Moreover, a modified fatigue model considering the effects of casting pores and the microstructure difference is proposed to describe the fatigue performance of A356-T6 alloy.
关键词	A356-T6 alloy Casting pore Microstructure coarsening CP-FEM High -cycle fatigue
资助者	Institute of Metal Research, Chinese Academy of Sciences ; NSFC
DOI	10.1016/j.msea.2022.144106
收录类别	SCI
语种	英语
资助项目	Institute of Metal Research, Chinese Academy of Sciences[E055A501] ; NSFC[52201148]
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000868909600001
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：31[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/176294
专题	中国科学院金属研究所
通讯作者	Song, Hong-Wu
作者单位	1.Chinese Acad Sci, Inst Met Res, Shi changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.CITIC Dicastal Co Ltd, Engn Technol Res Inst, Qinhuangdao 066011, Peoples R China
推荐引用方式 GB/T 7714	Yang, Bao-Cheng,Chen, Shuai-Feng,Song, Hong-Wu,et al. Effects of microstructure coarsening and casting pores on the tensile and fatigue properties of cast A356-T6 aluminum alloy: A comparative investigation[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2022,857:16.
APA	Yang, Bao-Cheng.,Chen, Shuai-Feng.,Song, Hong-Wu.,Zhang, Shi-Hong.,Chang, Hai-Ping.,...&Li, Chang-Hai.(2022).Effects of microstructure coarsening and casting pores on the tensile and fatigue properties of cast A356-T6 aluminum alloy: A comparative investigation.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,857,16.
MLA	Yang, Bao-Cheng,et al."Effects of microstructure coarsening and casting pores on the tensile and fatigue properties of cast A356-T6 aluminum alloy: A comparative investigation".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 857(2022):16.